Steam-boiler



No. 626,526. Patented June 6, I899. P. W. BURKE.

STEAM BOILER.

(Application filed Dec. 22, 1898.)

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(No Model.)

P. W. BURKE.

STEAM BOILER.

(Application filed Dec. 22, 189B.)

'Patented June 6, I899.

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ATENT STEAM-BOILER.

SPECIFICATION forming part of Letters Patent No. 626,526, dated June 6, 1899. Application filed December 22, 1898- Serial No. 700,035. (No model.)

To all whom it may concern:

Be it known that I, PERCY NV. BURKE, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Steam-Boilers; and I do hereby declare the following to be afull, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to a combined fireflue and water-tnbe circulating-boiler.

The object of my invention is to provide a simple and effective construction of steamboiler by means of which the steaming capacity of the ordinary flue-boiler is greatly increased, a rapid circulation of water is secured, and all the impurities contained in the water, are delivered down into a mud-drum below the circulating system, so that they will be readily deposited as sedimentary matter and left undisturbed by passing currents. These advantageous results are secured bya simplified construction and arrangement of water-circulating tubes having return-bends and connecting near one end on each side of drawings, in which-- I Figure 1 represents a side elevation partly in section and with part of the tubes broken away. Fig. 2 represents a front end elevation. Fig. 3 represents a transverse vertical section on line 50 :c, Fig. 1.

The fire-tube or fine boiler A, having tubes at, is set in the furnace-walls D in the usual manner, and on each side of the same within the walls are arranged and connected my circulatin g water-tubes B and B. Near the rear end of the boiler is provided the bottom opening a, at which is connected the mud-drum leg 0, extending downward and connecting with the mud-drum F at the rear of the furnace. The furnace D is constructed with the usual grate (Z, ash-pit d, and bridge-wall E.

I preferably arrange and connect two sets of circulating coils orserpentines on each side of the boiler, and they connect with the interior of the boiler on each side below the water-line by means of the shorthorizontal tubes b and I), as shown in Fig. 3.

boiler A, connect at both the front and rear of the leg 0, and the left-hand set of coils (marked B) also connect at both the front and rear of said water-leg, as shownin Fig. 1. Both sets of coils on each side connect at the top with the water-tubes b l),'opening into the front of the boiler below the water-line. sential that the sets of coils connect at the front and rear of the leg 0, but they should connect on opposite sides thereof. By this construction cross currents are produced which arrest the sedimentary matter and favorits deposit into the mud-drum. The feedwater pipe H, having a valve It, connects with the tubular boiler A, preferably near its rear end, and discharges just above the opening of the water-legs O, as shown in Fig. 1. The feed-water being heavier than the water in the boiler, it flows down into the leg, helping the circulation.

The mud-drum F may be of the usual construction and provided in practice with a blow-off pipe (not here shown) leading into the ash-pit. Since the feed-wateris delivered into the main boiler A and the water-tubes B and B connect directly with the mud-drum leg 0 just below the boiler A, there is'no circulation of water in the mud-drum, whereby the deposit of sedimentary matter in the latter is very much favored.

Water being supplied to the boiler A, it will fill the mud-drum, the leg 0, and the circulating-pipes B B and rise to the desired height It is not esabove the tubes tr and the pipe connections b b in the boiler A. The furnace being properly fired, the water in the tubes 13 B directly above the grate will be heated first and caused to circulate through the tubes and discharge into boiler A through the lateral connecting-pipes I) Z), thus establishing a circulation through boiler A from the front thereof to the rear and down into the mud-drum undisturbed by any circulating currents.

While the impurities settle by gravity through the leg 0, the purer water continues to flowr into and through the tubes B B and thence through the boiler A, carrying along other impurities to the leg vC, where the precipitation and deposit of the heavier matters, which would tend to form scale, continuously go on, as above described. At suitable intervals the deposited matter is blown on? from the mud-drum.

The construction and arrangement of parts i in myinvention are distinguished from others heretofore proposed generally by simplicityi and cheapness without impairing efficiency, and particularly by the provision of returni 1 bends in the circulating-pipes and connec-i tion :of the latterdirectly with the mud-drum 1 leg, whereby the opposingcurrents produced willarrestrsedimentary matter and favor its deposit down through the leginte the mud-E drum.

My circulating-coils may be attached to 1 vany tubular boiler and to the mud-drum leg-1 leading down to'themud-drnm, as shown,,ati a small expense, and thereby increase the; heating-surface of the boiler about forty-five per cent, also creatinga rapid circulation? and delivering :all impurities into the muddrum, thereby keeping the boiler free from claim as new, and desire to secure by Letters scale and other impurities. The steaming capacity of the boiler will be much increased, 1 and therefore forced tiring and resulting smoke will 136110116 away with,-

Having-described my invention, what I{ Patent, is

1. The combination witha fire-tube or flue? steam-boiler, of a mud-drum below the same, a-m-udsdrum leg connecting the boiler with said drum,and water-circulatin g pipeshaving return-bends connecting near the top at one end of the boiler, and directly with said leg below the boiler, whereby the heavyimpurities' will be deposited in the mud-drum and left undisturbed by the water circulated above the same, substantially as described.

2. The combination with afire-tube or flue steam-boiler, of a-mud-drum below the same, a mud-drum leg connecting the boiler with said drum, water-circulating pipes having return-bends connecting near the top, at one end of the boiler, and directly with said leg on opposite sides, below the boiler, and-a feedwater pipe connectingwith said flue-boiler and dischargingnear the opening of the muddrurn leg, whereby the heavy impurities'will be deposited in the muddrum and left undisturbed by the water circulated above the same, substantially as described. p 3, The combination with the fire-tube or flue steam-boiler, of a mud-drum below the boiler, the amid-drum leg 0, connecting the bottom of the boiler at the'rear with said drum, one or more water-circulating coils as B, B, composed of tubes having return-bends, connecting at the upper end with the front end directly of the boiler, and at the lower end with said leg 0 .on opposite sides, and la feed-waterpipe connecting directly with said flue-boiler, whereby the impurities will beearriled by the circulating currents and deposited in .themud-drum and left undisturbed by-zthe currents of water circulated above, substantially as described.

In testimony whereof I aifix my signature.

in presence of two witnesses.

' PERCY W. BURKE.

Witnesses:

WILLIAM HUNT, CHARLES MCAULIFFE. 

